Wordnet polsko-angielski 
                         (approximately the last 63 million years) 
Cenozoic, Cenozoic era, Age of Mammals 
synonim: era kenozoiczna
Nowoczesny słownik polsko-angielski 
                        the Cenozoic
 (approximately the last 63 million years) 
Cenozoic, Cenozoic era, Age of Mammals 
synonim: era kenozoiczna
the Cenozoic